Table 1. Sample Demographic and Smoking Characteristics.
| Full sample (n=80)a | Placebo (n=43)b | Nicotine (n=37)c | |||
|---|---|---|---|---|---|
| M (SD) or n (%) | M (SD) or n (%) | M (SD) or n (%) | t or χ2 | p | |
| Demographics | |||||
| Age (years) | 29.89 (5.99) | 29.42 (6.10) | 30.43 (5.91) | −0.75 | 0.45 |
| Race | 2.29 | 0.13 | |||
| % African American/Black | 36 (45.0%) | 16 (37.2%) | 20 (54.1%) | ||
| Education | 2.60 | 0.27 | |||
| High school or less | 26 (32.5%) | 12 (27.9%) | 14 (37.8%) | ||
| Some college | 38 (47.5%) | 24 (55.8%) | 14 (37.8%) | ||
| College or beyond | 16 (20.0%) | 7 (16.3%) | 9 (24.3%) | ||
| Average cycle length (days) | 29.38 (1.84) | 29.35 (1.91) | 29.42 (1.78) | −0.18 | 0.86 |
| Smoking characteristics | |||||
| FTND | 4.95 (1.95) | 4.60 (2.01) | 5.35 (1.83) | −1.74 | 0.09 |
| Screening session CO | 17.33 (6.61) | 17.37 (5.98) | 17.27 (7.35) | 0.07 | 0.95 |
| Cigarettes/day | 13.90 (4.97) | 13.16 (4.25) | 14.76 (5.63) | −1.44 | 0.15 |
| Years regular smoker | 11.06 (6.43) | 10.23 (6.52) | 12.03 (6.26) | −1.25 | 0.22 |
| Number of serious quit attempts | 3.85 (11.36) | 3.35 (4.59) | 4.43 (16.07) | −0.42 | 0.67 |
| MCD experimental session | |||||
| EF | 3.29 (1.43) | 3.26 (1.36) | 3.32 (1.53) | −0.19 | 0.85 |
| LF | 12.46 (2.63) | 12.65 (2.84) | 12.22 (2.38) | 0.72 | 0.47 |
| ML | 20.92 (2.61) | 20.58 (2.84) | 21.35 (2.25) | −1.29 | 0.20 |
| Hours abstinent experimental session | |||||
| EF | 17.89 (5.37) | 18.27 (7.29) | 17.45 (0.92) | 0.68 | 0.51 |
| LF | 17.98 (4.36) | 18.10 (4.38) | 17.84 (4.39) | 0.26 | 0.79 |
| ML | 17.52 (3.21) | 18.01 (4.22) | 16.96 (1.13) | 1.57 | 0.12 |
| Estrogen experimental sessions (pg/ml) | |||||
| EF | 2.23 (1.16) | 2.44 (1.40) | 1.98 (0.76) | 1.86 | 0.07 |
| LF | 2.60 (1.36) | 2.56 (1.20) | 2.66 (1.53) | −0.32 | 0.75 |
| ML | 2.59 (1.36) | 2.86 (1.50) | 2.27 (1.11) | 1.98 | 0.05 |
| Progesterone experimental sessions (ng/ml) | |||||
| EF | 0.13 (0.09) | 0.14 (0.11) | 0.11 (0.06) | 1.74 | 0.09 |
| LF | 0.14 (0.09) | 0.16 (0.08) | 0.13 (0.09) | 1.42 | 0.16 |
| ML | 0.20 (0.12) | 0.23 (0.14) | 0.18 (0.10) | 2.03 | 0.05 |
| MNWS baseline scores | |||||
| EF | 1.79 (1.24) | 1.95 (1.24) | 1.61 (1.24) | 1.24 | 0.22 |
| LF | 1.49 (1.20) | 1.47 (1.05) | 1.52 (1.37) | −0.21 | 0.83 |
| ML | 1.52 (1.06) | 1.55 (1.07) | 1.50 (1.06) | 0.21 | 0.83 |
| QSU baseline scores | |||||
| EF | 3.10 (1.36) | 3.04 (1.24) | 3.16 (1.50) | −0.41 | 0.68 |
| LF | 2.97 (1.45) | 2.78 (1.39) | 3.18 (1.51) | −1.24 | 0.22 |
| ML | 3.00 (1.33) | 2.89 (1.38) | 3.13 (1.27) | −0.80 | 0.42 |
| PANAS NA baseline scores | |||||
| EF | 1.39 (0.50) | 1.48 (0.61) | 1.29 (0.33) | 1.79 | 0.08 |
| LF | 1.37 (0.61) | 1.34 (0.44) | 1.41 (0.77) | −0.46 | 0.64 |
| ML | 1.39 (0.58) | 1.40 (0.45) | 1.38 (0.71) | 0.14 | 0.89 |
Abbreviations: CO, carbon monoxide; EF, early follicular; FTND, Fagerström Test for Nicotine Dependence (range: 0–10); CO, carbon monoxide; LF, late follicular; MCD, menstrual cycle day; ML, mid luteal; MNWS, Minnesota Nicotine Withdrawal Scale; PANAS NA, Positive and Negative Affect Schedule Negative Affect; QSU, Brief Questionnaire of Smoking Urges.
Note: Ns ranged from
a
77–80,
b
42–43, and
c
34–37 due to patterns of missing data.